#include "eighdr.h"

int main(void){
  int i = 0;
  char s[80] = "Hallo";
  while(s[i]){
    switch(s[i]){
    case 'a': case 'o': break;
    default:
      printf("%c",s[i]);
    }
    i++;
  }
  return 0;
}
